Invoke a Method on a JVM Object

Invoke methods on Java object references. These functions provide a mechanism for invoking various Java object methods directly from R.

invoke(jobj, method, ...)

invoke_static(sc, class, method, ...)

invoke_new(sc, class, ...)

Arguments

jobj	An R object acting as a Java object reference (typically, a `spark_jobj`).
method	The name of the method to be invoked.
...	Optional arguments, currently unused.
sc	A `spark_connection`.
class	The name of the Java class whose methods should be invoked.

Use each of these functions in the following scenarios:

`invoke`	Execute a method on a Java object reference (typically, a `spark_jobj`).	`invoke_static`
Execute a static method associated with a Java class.	`invoke_new`	Invoke a constructor associated with a Java class.


sc <- spark_connect(master = "spark://HOST:PORT")
spark_context(sc) %>%
  invoke("textFile", "file.csv", 1L) %>%
    invoke("count")